How to visualize 16bit-value 2-dimensional matrix in grayscale

[Pavel_47]

Thanks OReubens,

Indeed this way I can get grayscale. But I didn't understand what you mean saying

The above assumes a actual 16bits of limunessence in a linear scale

If all colors R,G,B have char-type value, the grayscale depth is 8 bit ?

Regards,

Pavel.